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I would absolutely love a feature that allowed you to have full text searching on a system that cannot (or I should say will not) install the pdftotext feature.

For me an ideal kind of thing would be to be able to upload a HTML galley but have a tick box that hides it from public view, or just upload a text/html file that can be indexed.

P.S. I have seen the hack to gray out the html but I am in the process of planning to bring a number of journals into the OJS framework and hacks are undesirable when dealing with a larger number of journals.

A while ago, we implemented something like what you want because we were having pdftotext issues. It involves creating a text file containing the full text of the PDF, which is uploaded as a hidden file and handed to the indexer for searching.

I'm attaching a unified diff to my post, which contains the code. It's a diff against version 2.1.0 of OJS, and may/may not go in cleanly against the latest branch. We've since moved away from it, because our issue with pdftotext has been remedied and we're using that now, instead.